login failed in roundcube only

[r2zvi]

environment: postfix + dovecot + postfixadmin + mysql + roundcube
two domains set up, i can login every account in both domains with thunderbird

config.inc.php:

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// system error reporting, sum of: 1 = log; 4 = show
$config['debug_level'] = 4;
// Log SQL queries
$config['sql_debug'] = true;
// Log IMAP conversation
$config['imap_debug'] = true;
// Log LDAP conversation
$config['ldap_debug'] = true;
// Log SMTP conversation
$config['smtp_debug'] = true;
$config['db_dsnw'] = 'mysql://roundcube:PASS@localhost/roundcubemail';
$config['default_host'] = 'localhost';
$config['default_port'] = 143;
$config['smtp_server'] = 'localhost';
$config['smtp_port'] = 25;
$config['smtp_user'] = '%u';
$config['smtp_pass'] = '%p';
$config['plugins'] = array(
    'archive',
    'zipdownload',
);
maillog:

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Feb  3 21:22:43 mx dovecot: imap-login: Disconnected (auth failed, 1 attempts in 2 secs): user=<[email protected]>, method=CRAM-MD5, rip=127.0.0.1, lip=127.0.0.1, secured, session=<bB5Je266ioN/AAAB>

where should i start to figure out the problem? Thanks

[alec]

default_host='tls://localhost'

[r2zvi]

i tried that, no luck,  "Connection to storage server failed"
and in maillog, there is no user name presented, the same applies to "ssl://localhost"

Code Select Expand

Feb  4 02:28:23 mx dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=127.0.0.1, lip=127.0.0.1, TLS, session=<A3QrdXm6lIN/AAAB>

[alec]

Look into Roundcube error log, and/or enable imap_debug there. It may give you some hints.

[r2zvi]

well, if you look closely, i've already turned on all the log options in config.inc.php, but no any other logs found except the ones posted here.
Thanks for your help anyway

[JohnDoh]

Did you disable the SSL certificate verification? see imap_conn_options

[r2zvi]

i added the following code in config.inc.php, but still got the same error and logs

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$config['imap_conn_options'] = array(
  'ssl' => array(
    'verify_peer'  => false,
    'verify_peer_name' => false,
  ),
);

[r2zvi]

logs in maillog look just like login failed with wrong password, but with the same password i can login with thunderbird and python imaplib in remote client
there is no extra info/logs to analyze so i have no clue where to start debugging

i have another machine running dovecot + postfix + sqlite + roundcube(1.4.9) with single domain which works well, copy and modify config.inc.php didn't make the problem disappear

[r2zvi]

i actually replaced it with rainloop and it works well and smoothly